Acacia anarthros is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia.

It is a shrub with bipinnate leaves with 1 leaflet, each with 2 or 3 pairs of pinnules, spherical heads of 14 to 17 flowers, and narrowly oblong pods up to about 60 mm (2.4 in) long.

Acacia anarthros is an erect or prostrate, spiny shrub that typically grows to a height of 10–50 cm (3.9–19.7 in) and has flexuous branchlets.

[2] This wattle has a limited range around New Norcia as a part of heathland or open Eucalyptus wandoo or Corymbia calophylla woodland communities, and sometimes in heath.

[2][3] Acacia anartoros is listed as "Priority three" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions[5] meaning that it is poorly known and known from only a few locations but is not under imminent threat.